blockActiveAirFlow
Output the active airflow setpoint for dual-duct terminal unit using mixing control with discharge flow sensor
Information
This sequence sets the active cooling and heating maximum and the active minimum setpoints for dual-duct terminal unit using mixing control with discharge flow sensor. The implementation is according to the Section 5.13.4 of ASHRAE Guideline 36, May 2020.
The setpoints shall vary depending on the mode of the zone group.
| Setpoint | Occupied | Cooldown | Setup | Warm-up | Setback | Unoccupied |
|---|---|---|---|---|---|---|
Cooling maximum (VActCooMax_flow) | VCooMax_flow |
VCooMax_flow | VCooMax_flow |
0 | 0 | 0 |
Minimum (VActMin_flow) | VOccMin_flow | 0 | 0 | 0 | 0 | 0 |
Heating maximum (VActHeaMax_flow) | VHeaMax_flow |
0 | 0 | VHeaMax_flow | VHeaMax_flow |
0 |
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | VCooMax_flow | Design zone cooling maximum airflow rate | |
| Real | VHeaMax_flow | Design zone heating maximum airflow rate |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Controls.OBC.CDL.Interfaces.RealInput | VOccMin_flow | Occupied minimum airflow setpoint | |
| Buildings.Controls.OBC.CDL.Interfaces.IntegerInput | uOpeMod | Zone operation mode | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | VActCooMax_flow | Active cooling maximum airflow setpoint | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | VActMin_flow | Active minimum airflow setpoint | |
| Buildings.Controls.OBC.CDL.Interfaces.RealOutput | VActHeaMax_flow | Active heating maximum airflow setpoint |
Revisions
-
August 1, 2020, by Jianjun Hu:
First implementation.